Improvement in cocks



fihi/Hyg N. PETERS, FHOIULIFHOGRAPHEH. WASHINGTON, D C,

UNITED STATES PATENT OFFICE.

JOSEPH L. LOWRY, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN COCKS.

Specification forming part of Letters Patent No. 4 1.077, dated January 5, 1864.

To all whom it may concern.-

Beit known that 1, JOSEPH L. LowRv, of the city of Pittsburg, in the county ot' Alle gheny and State ot' Pennsylvania, have invented a new and useful Improvement in the Construction of Stop Cocks; and ldo hereby d clare that the following is a full, clear, and exact description thereof'. reference bein g had to the accompanying drawings, which form part ot' this specilication, and to the letters of reference marked thereon, in whichl Figure l represents a brass and iron ring forminga valve-seat, part ot' which is cutaway the better to show the plan by which they are united together. Fig'. 2 shows a longitudinal section ofthe screw for lifting the valve. Fig. 3 represents the valve with a brass ring attr ched, secured in the same manner as at Fig'. l. Fig. 4 represents a vertical front section ofa four-way coclf, showing the mannerin which the valve is lifted by the screw,-also the mode of packing the same. Fig. 5 is a transverse section ot' avalve. Fig. 6 represents a front view` of the valve with an entire brass face and its mode ot' attachment. Fig. 7 shows plainly the old method of attach-ing the bra-ss to a cast-iron disk.

All the parts are lettered and similar letters indicate like parts on all the iigures.

My invented consists of a superior and cheap method of packing around the stem or male screw, makinga simple yettight jointin amanner not easily got ont of repair. For this purpose Iconstruct the body of the stop cock with a double shifting-box, T, having a pai tition in the middle through which the stem B passes. Around this stein and just underneath the partition J is placed an india-rubber or gum gasket, X, which serves to tighten the joint when the valve is drawn up, as the upper part ot the valve R is provided with a projection, D, which acts against the gum ring X when the valve is open.

On closing the valve by turning the screw the stem is prevented from rising on account ofthe capf pressing down on a collar formed on the stem of the screw. This cap is made ad `justable through the bolts K K and nuts thereonnr. Insideot'this stutiing-box andjust above the partition J is placed another gum ring,F,whieh, as the valveis being forced down, is pressed upon the partition by a collar, m, on the stem of the screw B, which tends to keep the joint around the stem perfectly tight in either opening or closing the valve.

Havingr thus described my improvements in the construction of stopcocks, what I claim and desire to secure by Letters Patent, is-

The double stuffing-box T, with the partition J, in combination with the valvesteni B and collar m, the gum rings above and below the partition, arranged substantially as herein shown and set forth.

JOSEPH L. LOWRY.

Witnesses:

J. W. ELLs, KENNEDY MAnsHALL. 

